#include<iostream>
#include<unistd.h>
#include<sys/types.h>
using namespace std;
int main()
{
    while(1)
    {
        std::cout<<"hello world"<<std::endl;
    cout<<"my pidis:"<<getpid()<<endl;
    cout<<"my ppids:"<<getppid()<<endl;
        sleep(1);
    }
    return 0;
}
